This part of IEC 60728 applies to system outlets, splitters and taps, passive single or multiple port equipment comprising filters, attenuators, equalizers, galvanic isolators, power injectors, cable splices, terminating resistors and transfer points, but excluding coaxial cables and receiver leads (see 5.2). This standard • covers the frequency range 5 MHz to 3 000 MHz; • identifies performance requirements for certain parameters; • lays down data publication requirements for certain parameters; • stipulates methods of measurements; • introduces minimum requirements defining quality grades. There are three grades for all passive equipment except system outlets where there is only one. Different networks require the same performance and, when integrating networks, upgrading will be avoided. Practical experience has shown that these three grades meet most of the technical requirements necessary for supplying a minimum signal quality to the subscribers. This classification should not be considered as a requirement but as information for users and manufacturers on the minimum quality criteria of the material required to install networks of different sizes. The system operator should select appropriate material to meet the minimum signal quality at the subscriber's outlet and to optimize cost/performance, taking into account the size of the network and local circumstances. All requirements and published data should be understood as guaranteed values within the specified frequency range and in well-matched conditions.
IEC 60728-4-2007由国际电工委员会 IX-IEC 发布于 2007-08。
IEC 60728-4-2007 在中国标准分类中归属于: M60 广播、电视网综合,在国际标准分类中归属于: 33.060.40 电缆分配系统,33.170 电视播放和无线电广播。
* 在 IEC 60728-4-2007 发布之后有更新,请注意新发布标准的变化。
IEC 60728-4-2007 电视信号、声音信号和交互式服务用电缆网络.第4部分:同轴电缆网络用无源宽带设备(TA 5) 由 IEC/TR 61022-1989 变更而来。
非常抱歉,我们暂时无法提供预览,您可以试试: 免费下载 IEC 60728-4-2007 前三页,或者稍后再访问。
点击下载后,生成下载文件时间比较长,请耐心等待......
Copyright ©2007-2022 ANTPEDIA, All Rights Reserved
京ICP备07018254号 京公网安备1101085018 电信与信息服务业务经营许可证:京ICP证110310号